A piece of transparent material specifically designed to be placed directly in front of a dial or scale to protect it from foreign matter. It is cut to size and may include a frame. It may have an index line or other marking. See also window, observation; and dial, scale.
Classification: Clock or watch glass; glasses for noncorrective spectagles not optically worked; hollow glass spheres and their segments for the mnfctr ofsuch glasses
NSN 6240-01-011-4844
NSN 4140-00-935-5360
NSN 6240-00-421-5368
NSN 6620-00-860-9911
NSN 4140-01-268-2429
NSN 5975-01-478-1262
NSN 6685-01-463-5357
NSN 6110-00-889-1263
NSN 6685-01-139-0270
NSN 5930-00-586-3585
NSN 6145-01-605-4451
NSN 5945-00-764-7039